"Song Zhenlun introduced that physical vapor deposition combined with grain boundary diffusion technology can increase the coercivity of sintered NdFeB permanent magnet products (average 2-3 grades) while reducing the amount of heavy rare earth addition by 60%."
http://newmat.chinaiol.com/xtcl/s/1218/14205474.html
While NTU and its pet commentators desperately try and maintain the spin, the Chinese mag makers just keep on developing the techniques to delete it.
"Song Zhenlun introduced that physical vapor deposition combined...
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